-
FluorideRemoval Rate: 90%
-
SSRemoval Rate: 83%
-
TPRemoval Rate: 80%
Introduction
Coal chemical plants face growing challenges in meeting stringent fluoride discharge standards for industrial wastewater. A breakthrough 24,000 m³/day wastewater treatment upgrade in Shandong's Tengzhou City demonstrates how complexation-based deep defluoridation technology can achieve stable compliance at remarkably low costs. This coal chemical wastewater treatment case study showcases an innovative retrofit of existing infrastructure that solved persistent fluoride while keeping chemical costs below $0.13/m³.
Project Overview
Wastewater Characteristics & Challenges
The plant's biologically treated effluent and circulating blowdown water contained:
Fluoride (5.0-9.0 mg/L) - exceeding local standards
Suspended solids (30-60 mg/L)
Total phosphorus (1.2-1.5 mg/L)
Existing system failed to consistently meet DB37/3416.1-2018 for Nansi Lake Basin (<1.0 mg/L fluoride)
Innovative Treatment Solution
The upgrade utilized:
Retrofitted Existing Infrastructure
Modified original three-stage flocculation sedimentation system
Minimal capital investment required
Complexation Deep Defluoridation Technology
Selective fluoride removal mechanism
Low chemical consumption (0.6-0.9 RMB/m³)
Stable performance across water quality fluctuations
Key System Advantages
80-90% fluoride removal efficiency
Simultaneous SS and TP reduction
Minimal sludge production
Easy integration with existing processes
Performance & Results
Treatment Efficiency Metrics
| Parameter | Influent | Effluent | Removal Rate |
| Fluoride | 9.0 mg/L | ≤ 1.0 mg/L | 90% |
| SS | 60 mg/L | ≤ 10 mg/L | 83% |
| TP | 1.5 mg/L | ≤ 0.3 mg/L | 80% |
Economic & Regulatory Benefits
Chemical costs: Just 0.6-0.9 RMB/m³ ($0.09-0.13/m³)
Full compliance with Nansi Lake Basin standards
No major infrastructure expansion required
Operational simplicity for plant staff
Conclusion
This coal chemical wastewater treatment upgrade proves that advanced defluoridation technologies can solve compliance challenges without expensive plant overhauls. The project's success - achieving consistent fluoride levels ≤1.0 mg/L at minimal operating cost - makes it a model for industrial wastewater treatment upgrades across China's coal chemical sector. For plants facing similar fluoride discharge challenges, this case demonstrates how smart process retrofits can deliver both regulatory compliance and economic efficiency.
*Contact us today, get free coal chemical wastewater solution!
Request Quote
Tell us your inquiry, we will recommend a suitable product model or solution for you!
